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2 years ago

6

Explain wet and dry compression tests

1 answer:

miskamm [114]2 years ago

5 0

A wet compression test is similar to a dry compression test except it has the addition of oil placed in each cylinder. A wet compression test is done for two reasons: One or more cylinders has a reading of less than 100 psi on the dry compression test.

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2 years ago

A thick steel slab (rho= 7800 kg/m3 , cp= 480 J/kg K, k= 50 W/m K) is initially at 300 °C and is cooled by water jets impinging

dimaraw [331]

Answer:

t = 2244.3 sec

Explanation:

calculate the thermal diffusivity

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$= \frac{50}{7800\times 480} = 1.34 \times 10^{-5} m^2/s$

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we know that

$\frac[ T_{28} - T_s}{T_i -T_s} = erf(\frac{x}{2\sqrt{at}})$

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w = 0.08073

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t = 2244.3 sec

3 0

2 years ago